Eco Cork Foam (ECF) is the only underlayment that delivers 10 features in every roll. Engineered using a proprietary blend of polyethylene and granulated cork, ECF is technologically advanced and outperforms the competition in every way, from moisture protection to ease of installation. ECF features Ultra-Fresh antimicrobial protection for a cleaner underlayment and delivers superior sound absorption for a quieter home. ECF can be used on wood or concrete subfloors and on any level of your home, including basements. When used over a concrete subfloor, ECF eliminates the need for an additional vapor barrier, saving time and money. ECF is an ideal underlayment for both commercial and residential use. Check out ECF's 10-in-1 features listed below.